Home | Tournaments | Calendar | Weather | Merchandise | Sponsors |
|
All About Guns What's your weapon of choice, and why? Discuss the beloved speargun here! |
|
Thread Tools | Rate Thread | Display Modes |
11-19-2020, 02:29 PM | #1 |
Registered User
Join Date: Feb 2015
Posts: 64
|
Carbon stringers
Hi guys, I'm laying up a few blanks for myself this winter. I would like to try some with a few carbon stringers in the blank. Anyone have suggestions for sources for longer strips? Pulltruded vs. other types? Some carbon layups better to deal with during shaping than others?
|
11-23-2020, 08:43 AM | #2 |
Registered User
Join Date: Nov 2016
Location: Bilbao (Spain)
Posts: 445
|
Re: Carbon stringers
I just cut long strips out of bidirectional cloth. Since my main use is carbon skinning, it doesn't hurt much to cut lengthwise. You just need to make sure the main piece is at least as long as your blank.
Don't worry much about the lamination, you are going to clamp it and it will be mostly hidden once the gun is finished. If you go for looks, you will have to use at least two plies. A single piece of cloth might not give the effect your are looking for. Mikel |
11-23-2020, 04:48 PM | #3 |
Registered User
Join Date: Feb 2015
Posts: 64
|
Re: Carbon stringers
Thanks for your reply Mikel. I'm going to go with your suggestion. It doesn't seem out of reach for my skillset. Right now I'm planning out a few builds. I'd like to build a gun that can send a 10mm shaft to 10m.
I have mocked up a design for a 72" water-ballasted gun with 2X 1-3/4 in carbon tubes, and a third 1.25" tube. By my numbers this gun, if built, should hold about 10.5 lbs of water, and weight between 14 and 16 lbs dry (without shaft). But it is damn bulky at 3.15 x 4.5 in. This certainly would still be a challenge to travel with, despite the light dry weight accomplished with water ballasting. This gun would likely be driving a 10mm shaft with 7X 16mm bands. I may re-design the muzzle to get the bands to lay better. Alternatively, I could try to build a large inverted roller like one recently posted by Satdiver. That gun weighs in at 12.3 lbs with a 10mm shaft. If it does perform just as well as the larger, heavier water ballasted gun, there's no doubt it would be easier to travel with. The only really big advantage to the water ballasted gun would then be simplicity. I guess I really have no option but to build both. Really the only way to get the best comparison.... |
11-24-2020, 04:55 AM | #4 |
Registered User
Join Date: Nov 2016
Location: Bilbao (Spain)
Posts: 445
|
Re: Carbon stringers
|
11-24-2020, 04:32 PM | #5 |
Registered User
Join Date: Feb 2008
Posts: 152
|
Re: Carbon stringers
Holy cow that would be a cannon! Please share the results
|
12-03-2020, 02:17 AM | #6 |
Registered User
Join Date: Jul 2011
Posts: 647
|
Re: Carbon stringers
Carbon stringers are far more abrasive than I expected. They chewed up one of my thickness plane blades. Tried it with a tungsten router straightening jig with more success though it took the edge off that too. One of the blanks twisted against the carbon. I will give them a miss as they add nothing to my specific builds.
|
12-03-2020, 04:45 AM | #7 | |
Registered User
Join Date: Nov 2016
Location: Bilbao (Spain)
Posts: 445
|
Re: Carbon stringers
Quote:
Mikel |
|
Bookmarks |
Thread Tools | |
Display Modes | Rate This Thread |
|
|